采空区顶板大面积冒落诱发冲击气浪模拟

基金项目:

山东省自然科学基金资助项目(No.Y2006E06)

山东省科技攻关资助项目(No.2008GG10006016)

详细信息

Simulation of air shock waves induced by large-scale roof caving in huge mined-out area

1. School of Civil and Environmental Enigineering, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Resourses and Environmental Engineering, Shandong University of Technology, Zibo 255049, China

摘要: 基于采空区冒落过程中冒落岩体与空气相互作用中能量的守恒与转化,建立了冲击气浪风速模型,设计制作了模拟实验测试装置。实验表明,随着下落高度增加,冲击气浪风速增加幅度略有减缓,采用大断面空间小尺寸的"打气筒"模型计算能够更好地反映冒落过程中的气体流动过程,但应该以"打气筒"和"绕流"的复合模型表征冲击起浪。在实验基础上建立的实验模型与理论模型有很好的相似性。
- 地下采矿 /
- 冒落 /
- 危害 /
- 预测 /
- 冲击气浪 /
- 风速
Abstract: Based on energy conservation and transformation caused by the interaction of caving rock and air in the course of roof caving in large-size mined-out area,a wind speed model of impact waves was constructed and an experimental device was designed.Experimental results show that with the increasing of rock falling height,the amplitude of wind speed of impact waves slowly increases.The small-size inflator model in a large cross-section space could better describe air flow during roof caving,but air shock waves should be expressed by the inflator and external flow compound model.The established experimental and theoretical models have a great similarity.
- underground mining /
- caving /
- hazard /
- prediction /
- air shock wave /
- wind speed